The M1070 tractor and M1000 trailer are currently used by the U.S. military as tank carriers, and the tractor and trailer are collectively known as HETS (Heavy Equipment Transport System). The M1070 was produced by Oshkosh in 1992, and has been in use by the U.S. military since 1993; it is mainly used to transport the M1 Abrams main battle tank, but also armored personnel carriers, self-propelled artillery, bulldozers and more. It is also used to transport large vehicles.